/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.servicecomb.swagger.invocation.converter.impl;

import java.util.HashSet;
import java.util.Set;

import io.servicecomb.swagger.invocation.converter.Converter;

public final class SameElementArrayToSet implements Converter {
  private static final Converter INSTANCE = new SameElementArrayToSet();

  public static Converter getInstance() {
    return INSTANCE;
  }

  private SameElementArrayToSet() {
  }

  @Override
  public Object convert(Object value) {
    if (value == null) {
      return null;
    }

    Object[] array = (Object[]) value;
    Set<Object> set = new HashSet<>();
    for (Object e : array) {
      set.add(e);
    }
    return set;
  }
}
